can exchange
Verbo regular: exchange - exchanged- exchanged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can exchange
you can exchange
she can exchange
we can exchange
you can exchange
they can exchange 	I can be exchanging
you can be exchanging
she can be exchanging
we can be exchanging
you can be exchanging
they can be exchanging	I can have exchanged
you can have exchanged
she can have exchanged
we can have exchanged
you can have exchanged
they can have exchanged	I can have been exchanging
you can have been exchanging
she can have been exchanging
we can have been exchanging
you can have been exchanging
they can have been exchanging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't exchange
you can't exchange
she can't exchange
we can't exchange
you can't exchange
they can't exchange 	I can't be exchanging
you can't be exchanging
she can't be exchanging
we can't be exchanging
you can't be exchanging
they can't be exchanging	I can't have exchanged
you can't have exchanged
she can't have exchanged
we can't have exchanged
you can't have exchanged
they can't have exchanged	I can't have been exchanging
you can't have been exchanging
she can't have been exchanging
we can't have been exchanging
you can't have been exchanging
they can't have been exchanging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I exchange?
can you exchange?
can she exchange?
can we exchange?
can you exchange?
can they exchange? 	can I be exchanging?
can you be exchanging?
can she be exchanging?
can we be exchanging?
can you be exchanging?
can they be exchanging? 	can I have exchanged?
can you have exchanged?
can she have exchanged?
can we have exchanged?
can you have exchanged?
can they have exchanged? 	can I have been exchanging?
can you have been exchanging?
can she have been exchanging?
can we have been exchanging?
can you have been exchanging?
can they have been exchanging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I exchange?
can't you exchange?
can't she exchange?
can't we exchange?
can't you exchange?
can't they exchange? 	can't I be exchanging?
can't you be exchanging?
can't she be exchanging?
can't we be exchanging?
can't you be exchanging?
can't they be exchanging? 	can't I have exchanged?
can't you have exchanged?
can't she have exchanged?
can't we have exchanged?
can't you have exchanged?
can't they have exchanged? 	can't I have been exchanging?
can't you have been exchanging?
can't she have been exchanging?
can't we have been exchanging?
can't you have been exchanging?
can't they have been exchanging?